Abstract
Materials with preferred orientation exhibit unique properties that are frequently improved in comparison with those that are randomly oriented. Optical waveguide devices require high-quality single-crystal–like thin films because of their low optical propagation loss and their near–single-crystal properties. The growth mechanisms of textured films on non-lattice matched amorphous substrates, such as glass, are different from those on single-crystal substrates or the surface of a metal electrode. In this study, highly (100) oriented Pb(Zr,Ti)O3 PZT films were grown on an amorphous substrate by means of the sol-gel multicoating method, using lanthanum nitrate as a buffer layer. The lanthanum nitrate buffer layer was also very effective as a diffusion barrier against Pb-Si interdiffusion. The electrooptic properties of the PZT films were markedly enhanced when their orientation was adjusted to the (100) direction.
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Choi, JJ., Park, GT. & Kim, HE. Electrooptic properties of highly oriented Pb(Zr,Ti)O3 film grown on glass substrate using lanthanum nitrate as a buffer layer. Journal of Materials Research 19, 3152–3156 (2004). https://doi.org/10.1557/JMR.2004.0432
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DOI: https://doi.org/10.1557/JMR.2004.0432